Driving mechanisms for flyers



H. SGI- I NEIDER DRIVING MECHANISI FOR FLYERS 3 Sheets-Sheet 1 FiledJune 7, 1930 '2' m azm m Oct. 20, 1931. SCHNEIDER 1,828,259

DRIVING MECHANISM FOR FLYERS Filed June 7, 1930 3 Sheets-Sheet 2 a Z I2/ I j'm azmpm Oct-20,1931. H. SCHNEIDER I 1,328,259

DRIVING MECHANISM FOR FLYERS I Filed June 7 19:50

3 Sheets-Sheet 3 m m m Patented Oct. 20, 1931 UNITED STATES HEINRICHSCHNEIDER, OF ZURICH, SWITZERLAND DRIVING MECHANISMS FOR FLYERSApplication filed June 7, 1930; Serial No My invention relates toimprovements in driving mechanisms for flyers and more particularly indriving mechanisms in which the fiyer is mounted on a spindle driven byan electro-motor and mounted so as to rotate nearly without friction.The object of the improvements is to provide a mechanism in which thedisturbances in the operationof the fiyer are prevented which are causedwhen spinning threads with a high twist. I have found that under suchcircumstances the flyers are slightly turned backwardly by the tensionof the thread when arresting the machine so that the said thread isformed into a loop and wound around the eye of thefiyer. Further, whenspinning yarn with heavy braking action and by means of machines havingstrong electric motors, a torn thread cannot be readily applied to thespindle by merely throwing the fiyer into operation after arresting thehollow spindle thereof and passing the torn thread upwardly through thesame while the other motors are in operation, because the startingmoment of the motor tends to accelerate the heavy spindle thus causing ahigh tension of the thread'so that the attendant can not hold the endofthe thread in his hand.

My invention consists in providing braking means in connection with thespindle of the flyer which are thrown into operation after throwing thewhole machine out of operation and when the moment of the motor fallsbelow the tension of the threads, and when the thread is applied to asingle spindle while the other spindles continue their operation.

For the purpose of explaining the invention several examples embodyingthe same have been shown in the accompanying drawings in which the samereference characters have been used in all the views to indicatecorresponding parts. In said drawings Fig. 1 is a sectional elevationshowing a fiyer and its driving mechanism,

. 459,759, and in Germany June 17, 1929.

Fig. 2 is a sectional plan view taken on the line 2'2 of Fig. 1,

Fi 2a is a similar sectional plan view showing a modification, t

Fig, 3 is a sectional elevation showing another modification,

Fig. 4 is a sectional plan view takenon the line 44 of Fig. 3,

Fig. 5 is a partial sectional elevation of the fiyer shown in Figs. 3and 4 and illustrating the electrical operating mechanism thereof,

F 1g. 6 is a sectional plan view taken on the line 6-6 of Fig. 5, and

Fig. 7 is a similar sectional plan view showing a modification.

In the example shown in Figs. 1 and 2 the mechanism comprises a casing 1and an electric motor having a stator 2 and a rotor 4. The windings havebeen omitted for clearness sake. The rotor is secured to a verticalspindle 3 mounted in anti-friction bearings 5 and 6. To the top end ofthe spindle a cap 7 is secured which is formed with recesses 71receiving brake blocks 8 acted upon by springs 9. The inner faces of thesaid brake blocks carry linings 10 having a high coefiicient offriction, which linings are adapted for frictional engagement with aflange 11 provided on the top wall of the casing 1. The hub of the disk7 clamps the inner race ring of the anti-friction bearing 5 in positionand provides a protective shield for the said anti-friction bearing.

While the spindle 3 is out of operation the brake blocks 8 are pressedby the springs 9 into frictional engagement with the brake ring 11 thuspreventing rotation of the spindle 3. The tension of the springs 9 needbe only such that the highest possible tension of the thread being spundoes not overcome the friction when the parts are at rest. Whenenergizing the motor rotary movement is im parted to the fiyer spindle 3against the action of the brake blocks 8. After a certain number of'revolutions has been attained the brake blocks are thrown out offrictional engagement with the ring 11 whereupon the spindle 3 is freelyrotated. hen the motor is thrown out of operation, and the number ofrevolutions of the spindle falls off the power of the springs 9 exceedsthe centrifugal force so that the brake blocks engage the ring 11 andprevent return movement of the fiver 50 when the spindle is arrested.

L In the construction so far described the brake blocks 8 have thefunction of weighted bodies exposed to centrifugal action. In Fig. 264 Ihave shown a modification in wlnch the brake blocks are in the form oflevers 13 rockingly mounted on pivot bolts. The springs 9 are embeddedin sockets 131 of the levers 13.

In the modification shown on Figs. 3 and 4 a spider is fixed to thespindle 3 between the motor and the flyer 50, the said spider comprisinga hub 16 secured to the spindle and arms 17 carried by said hub.concentrically of said spider an electromagnet .18 mounted within thebottom part of the casing 1 which electromagnet comprises an annularyoke 19 and field windings 18. Preferably the d1stance between the fieldpoles of the yoke is equal to the distance between the arms of thespider.

In the operation of the apparatus the electromagnet is automaticallyenergized by means of contacts subjected to centrifugal action when thenumber of revolutions of the motor is reduced below a certain limit, thesaid contacts closing the circuit of the windings of the elect-romagnet,while the said circuit is broken when the number of revolutions risesabove the said limit. For clearness sake the said contacts have not beenshown in Figs. 3 and 1, but the electrical construction will beunderstood from Figs. 5 and 6.

is shown in these figures, the annular yoke 19 of the electromagnetcarries two annular contact members 20 and 21 separated from each otherand from the yoke 19 by insulating material (not shown in the figures),so that the current cannot pass from the rings 20 and 21 to the yoke 19.To the bottom side of said yoke a contact 22 is secured, which islikewise insulated relatively to the yoke. The outer ring 20 and thelower ring 22 are connected respectively with leads 23 and 2 1. Therings 20 and 21 are adapted to be elec trica-lly connected by a contactpiece 22 mounted on an arm 26 made from elastic and insulating materialsuch as whale bone, wood, bakelite and the like. As appears from Fig. 6the said ring is curved and it is fixed to the shaft 3 by means of aneye 17. The ring 21 is electrically connected with the windings 18mounted on the poles of the yoke 19. The said windings are eitherconnected in shunt, separate leads being provided for connecting eachwinding with the ring 21, or all the windings are connected in series, asingle lead 28 being provided for connecting the ring 21 and one of thewindings, so the wind-' ings are successively connected with each otherwhile the last winding is connected by a lead 29 with the lower ring 22.If the windings are connected in shunt leads are provided for connectingeach winding with the lower ring 22.

In the example shown in the figures the windings 18 are connected inseries and for clearness sake the leads connecting successive windingshave been omitted.

The curvature of the arm 26 must be such that the contact piece 25cannot be brought by centrifugal action above the rings 20 and 21 forelectrically connecting the same, but that it is rocked beyond the sameat high velocity, so that the electrical connection is broken. When theelectric motor is started the contact piece 25 engages the rings 20 and21 at a certain number of revolutions thus electrically connecting thesame. Now the current flows from the lead 23 to the ring 20, the contactpiece 25, the ring 21, the lead 28, the windings 18, the lead 29, thelower c0ntact ring 22 and the lead 2 1. \Vhen further increasing thenumber of revolutions the arm 26 is further rocked into position forsetting the contact piece 25 beyond the inner ring 21, thus breaking theconnection between the rings 20 and 21 and interrupting the current.

In Fig. 7 I have shown a modification in which in lieu of the curved arm26 a stem 30 is provided which carries the contact piece 25 and isslidable in a sleeve 31 fixed to the shaft 3 by means of an eye 2.WVithin the sleeve 31 there is a spring 32 engaging the head formed atthe inner end of the stem 30 and bearing with its outer end on aninwardly directed flange of the sleeve 31. \Vhen starting theelectromotor the contact piece 25 is thrown outwardly by centrifugalaction, as is shown in Fig. 7 in dotted lines, thus connecting the rings20 and 21. Then further increasing the number of revolutions and thecentrifugal force the contact piece 25 is further thrown outwardly thusbreaking the connection between the rings 20 and 21.

In another modification brake blocks are mounted 011 levers adapted tobe rocked by springs into releasing position and acted upon by anelectromagnet throwing the same into braking position or vice versa,suitable means being provided for controlling the supply of current tothe electromagnets.

I claim:

1. In a spinning apparatus, a flyer, a motor for driving the same, abrake block rotatable with said fiyer and movable in response tocentrifugal action out of braking position, and yieldable meanscounter-acting said centrifugal action.

2. In a spinning apparatus, a flyer, a spindle carrying the sm am'o'tor' 'on'said spindle, a casing enclosing said motor, a disk on saidspindle above said casing, and brake blocks on said disk controlled bycentrifugal action and mounted for movement thereby out of brakingposition.

3. In a spinning apparatus, a flyer, a spindle carrying the same, themotor on said spindle, a casing enclosing said motor formed at its topwith an upwardly directed flange antifriction bearings in which saidspindle is rotatable, one of said anti-fricton bearings having its outerrace ring mounted on said flange, a disk on said spindle above saidcasing in position for clamping the inner race ring of the bearinghaving its outer race ring mounted on said flange and formed with a rimembracing said flange, brake blocks radially movable on said ring andadapted for braking engagement with said flange, and springs tending toforce said brake blocks into braking engagement with said flange.

4. In a spinning apparatus, a flyer, a motor for driving the same, anelectromagnetic brake for braking said flyer, and a circuit make andbreak device controlling the speed of the flyer and operable bycentrifugal action to render said brake inefi'ective.

5. In spinning apparatus, the combination with a flyer, of a motor fordriving said flyer, means for retarding rotation movement of said flyer,and means operable upon reduction of the speed of the flyer forrendering said flyer retarding means effective.

6. In spinning apparatus, the combination with a flyer, of a motor fordriving said flyer, means for retarding rotational movement of saidflyer, and means rotated by said motor and operable by centrifugal forceto render said flyer retarding means ineffective.

7. In spinning apparatus, the combination with a flyer, of a motor fordriving said flyer, means for retarding rotational movement of saidflyer, and means operable when the motor is regulated so that the torquedeveloped thereby is less than the thread tension for rendering saidflyer retarding means effective.

8. In spinning apparatus, the combination with a flyer, of anti-frictionbearings supporting said flyer for free rotation, a brake associatedwith said flyer and tending to prevent reverse rotation thereof inresponse to thread tension, and means controlled by the speed ofrotation of the flyer for rendering said brake effective when such speedfalls below a predetermined rate.

9. In spinning apparatus, the combination with a flyer, of anti-frictionbearings supporting said flyer for free rotation, a braking elementrotatably connected to said flyer, and relatively stationary meansnormally engaged by said element to retard rotation of said flyer, saidbraking element being movable under the action of centrifugal force outof flyer retarding position.

10. In spinning apparatus, the combination with a flyer, ofanti-friction bearings supporting said flyer for free rotation, anelectromagnetic brake associated with said flyer and tending to preventreverse rotation thereof in response to thread tension, and meanscontrolled by the speed of rotation of the flyer for rendering saidbrake effective when such speed falls below a predetermined rate, saidmeans including a device rotatably connected to said flyer and movablewith respect thereto under the action of centrifugal force to controlsaid electromagnetic means.

In testimony whereof I hereunto afiix my signature.

HEINRICH SCHNEIDER.

